List (by population size)
Tais – c. 53–56.5 million. Central Thai (Siamese) – c. ...
Chinese (primarily Teochew ) – c. 6–9 million. assimilated Sino-Thai (Luk Chin) – > 4.5 million. ...
Malays – 2–4 million.
Khmer – > 1.2 million.
Karen – c. 1 million.
Phu Thai – 470,000.
Thai Indians (multiple ancestries) – 450,000.
Mon – 414,500.